Arguably the most commercially successful performer and composer in popular music history, singer, songwriter, and musician Paul McCartney is a rock legend. In 1960, McCartney, together with John Lennon, founded the Beatles, a group that came to define a generation. After the band broke up in 1970, McCartney went on to record a number of hit albums with the group Wings, and he continues to have a successful solo career. Which of his songs has the distinction of being the most-covered song ever? Discuss